Concrete form



Dec. 8 1925- L. H. DODD CONCRETE FORM Filed March 2. 1925 A VNQ INVENTOR66/? Dada.

A TTO/(NE V Patented Dec. S, 1925.

UNITED STATES LESLIE H. DODD, OF KANSAS CITY, MISSOURI.

CONCRETE FORM.

Application filed March 2, 1925.

T (42/ whom it may concern:

Be it known that I, LESLIE H. Donn, a citizen of the United States,residing at Kansas City, in the county of Jackson and State of Missouri,have invented certain new and useful Improvements in Concrete Forms; andI do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilletin the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the figures of reference marked thereon,which form a part of this application.

This invention relates to forms for concrete floors and joistconstructions and more particularly to a knock down form which may beinexpensively constructed, easily set up and when set up will be rigidand preserve its configuration under the weight of the concrete which itsupports.

Forms for concrete constructions embodying the generic principles of myinvention have been used heretofore. Some of them are so expensive tomanufacture that their use is well nigh prohibited. My invention can beconstructed of conventional commercial parts so that the cost will bereduced to a minimum.

The novelty of the invention will be understood by reference to thefollowing description in connection with the accompanying drawings, inwhich- Fig. 1 is a perspective view showing several forms in place withcement flowed over them.

Fig. 2 is a bottom perspective View of the form with one of the spacersfor the side sections and one set of tie rods removed, and

Fig. 3 is a sectional view through the tie rod clamp.

The forms or domes are supported by the uprights l on which are theremovable cross beams 2. These support the soflit boards 3, the soflitboards in turn carrying the forms. Each form is shown as comprising twoside members a and 5 held in spaced relation by transverse spreaders 6which are positioned with respect to the side members by pairs of spacedcleats, those in each pair being designated 7 and 8. The cleats areshown as angle bars which are articles of commerce. That is, the cleatsmay be cut from commercial angle bars and used with the side members 4:and 5. For convenience Serial No. 12,722.

the side members 4i and 5 may consist of two wooden boards as thisconstitutes an inexpensive construction, but obviously I do not wish tobe limited to wood either for the side members or for the spreaders,although I recommend wood because the boards can be readily obtained andbecause the form would be easy to construct when it is made of wood.

On top of the side members 4; and 5, resting upon the Spreaders 6 aretop boards 4- and 5 one projecting inwardly from the edge of each sidemember. The boards a and 5 are of such widths that when the spreaders 6are in place there will be a gap between their edges. This is filled inby a board insert or web 9 running longitudinally of the form and whenit rests upon the spreader-s 6 the form is complete except for thefastening means.

In order to tie the members together I provide an adjustable tie bar,comprising two rods 10 and 11 with right angular projecting fingers 12and 13 at their outer ends which project through openings l i in thecleats and through openings 15 (one at each end) in the spacino; bars sothat the rods 10 and 1.1 tie the spacing bars 6 to the cleats and spacethe side members proper distances, one with respect to the other. On oneend of one of the rods (11) is a clamping member 16. it is provided witha jaw 17. The jaw 17 includes two side flanges 18 and 19 in which ispivoted a cam 20, there being space between the cam 20 and the aw 1'? toreceive the other rod 10. The member 10 may have sliding movementwithrespect to the member 11 so that when the side members t and 5 are inplace with the longitudinal insert or web 9 between their edges and thespacing bar 6 between the cleats, the tie bar being introduced and byclamping the cam 20 against the rod 10 the entire dome like form will bemade rigid, and as it rests upon the soffit boards, in spaced relationwith the complementary forms, the concrete 21 may be flowed over theform, as shown in Fig. 1. After an adequate time has elapsed for theconcrete to harden or set, the uprights 1 may be removed so that theentire form structure, including the members 2 and 3, as Well as thedomes, can be taken down. The forms can be collapsed ready to be set upas oocasion may demand.-

members, cleats inpairs, there being one side members,

In order to prevent sidewise shifting of the forms after they are set upI may utilize hook-shaped i'ncmbers 22 which may be fastened to the sidemembers 4 and 5 and extend far enough below them to hook under thesoffits. These members 'will maintain the completed form in properspaced relation.

From the foregoing it will, be apparent that the form may be easilyconstructed out of available material found upon the open market so thattl e expenseof manufacture will be rediieed to a minimum. Phat the formwill be rigid, strong and durable, that the form can be readily set, upand taken down in a most expeditious and convenient manner.

What I claim and-desire to secure by Letters-Patent is 1. A form,comprising two side members, pairs ofcomplementary spacedcleats on theinner "face of each side member, a spacing bar, the ends of which arelocated between the complementary cleats of each side menr ber holdingthe side members in spaced relation, top boards on the side members andthespacing bar, and a tie rod, comprising two members adjustablyconnected together, each member having a right angular extension passingtransversely through the cleats and through the spacing bar to securethe spacing bar to complementary cleats ofeach pair.

2.. A. form for concrete, comprisingtwo cleats in pairs, there being onepair in spaced. relation on each side member, a transverse spacing bar,the ends of which are between the cleats of each pair, the length of thespacing bar being such as to provide a space between the two sidemembers, longitudinally arranged top boards bridging the gap between thetwo side members and resting up oncthe spacing bar, two complementarytie rod members,

each having a right angular extension at one end, removably passingthrough the cleats and through the spacing bar, and means for clampingthe two tie rod memberstogether.

3. A form for concrete, comprising side pair in spaced relation on eachside member, a. transverse spacing bar, the ends of which are betweenthe cleats of each pair, the length of the spacing bar being such as toprovide a space between the two side mem bers, longitudinal membersbridging the gap between the two side members and resting upon thespacing bar, two complementary tie rod members, each having a rightangular extension at'onc end, removabh: passing through the cleats andthrough the spacing bar, and means for clamping the two tie rod memberstogether, said means comprising a clan'iprigidly fastened to one of thetie rod members and adjustably engaging the other.

4. A form for concrete, comprising two side members, cleats in pairs,there being one pair in spaced relation oncach side member, a transversespacing bar, the ends of which are between the cleats of each pair, thelength of the spacing bar being such as to provide a space between thetwo side members. longitudinal members bridgi the p between the two sidemembers and resting upon the spacing bar, two complementary tie rodmembers, eachhaving a right angularextension at one end, removably passing through the cleats and through the spacing bar, means for clampingthe two tie rod members together, saidineans comprising a clamp rigidlyfastened to one of the tie rod members and adjustably engaging theother, and a hook-shaped member at the lower edges of the side membersto engage under supports for the form to prevent sidewise movement ofthe form.

5. A concrete form comprising two side memborsin spaced relation, alongitudinal member between the edges of the side members to fill thespace between them, a remov able spacing bar within the side membersupon which the third member rests, means on the side men'ibeis forpreventing sidewisc movement oi the spacing bar, and a tying meanspassing through the side members and through the spacing bar, said tyingmeans having lateral adjustment.

In testimony whereof l allix, my signature.

LESLIE H. DODD.

